thunderbird company reported net income of $500 million and the company had 100 million common shares outstanding. in addition, thunderbird had 5 million shares of convertible preferred and 10 million outstanding warrants during the year. each preferred share pays a dividend of $4 per share and is convertible into three common shares. each warrant is convertible into one common share at $25 per share. the company's stock traded at an average $50 per share. thunderbird's diluted earnings per share for the year is closest to: